'''
--  @owner:opentestcase005
--  @date:2020/11/3
--  @testpoint:显示SQL语句的执行计划，且要按顺序给出选项
'''
import sys
import unittest
sys.path.append(sys.path[0]+"/../")
from testcase.utils.Logger import Logger
from testcase.utils.Constant import Constant
from testcase.utils.CommonSH import CommonSH


logger = Logger()
commonsh = CommonSH('dbuser')
constant = Constant()

class SYS_Operation(unittest.TestCase):
    def setUp(self):
        logger.info('------------------------Opengauss_Function_DML_Set_Case0051开始执行-----------------------------')

    def test_explain(self):
        # 建表
        sql_cmd1 = commonsh.execut_db_sql('''drop table if exists student;
                                      create table student(id int, name char(20));''')
        logger.info(sql_cmd1)
        self.assertIn(constant.TABLE_CREATE_SUCCESS, sql_cmd1)
        # explain语句，依次按analyze/analyse添加verbose参数
        sql_cmd2 = commonsh.execut_db_sql('''explain analyze verbose insert into student values(1,'a');
                                      explain analyse verbose insert into student values(1,'a');
                                      explain PERFORMANCE insert into student values(1,'a');''')

        logger.info(sql_cmd2)
        self.assertIn(constant.EXPLAIN_SUCCESS_MSG, sql_cmd2)
        # explain语句，依次添加参数verbose，analyze/analyse，合理报错
        # explain不按顺序添加PERFORMANCE语句，合理报错
        sql_cmd3 = commonsh.execut_db_sql('''explain verbose analyze insert into student values(1,'a');
                                      explain verbose analyse insert into student values(1,'a');
                                      PERFORMANCE explain insert into student values(1,'a');''')

        logger.info(sql_cmd3)
        self.assertIn('ERROR:  syntax error', sql_cmd3)

    # 清理环境
    def tearDown(self):
        logger.info('----------this is teardown-------')
        # 删除表
        sql_cmd3 = commonsh.execut_db_sql('''drop table student;''')
        logger.info(sql_cmd3)
        logger.info('------------------------Opengauss_Function_DML_Set_Case0051执行结束--------------------------')
